New fibrous carboxyl cation exchangers for sorption cations of heavy and non-ferrous metals from water
https://doi.org/10.29235/1561-8331-2024-60-3-192-202
Abstract
New fibrous carboxyl cation exchangers FIBAN were synthesized by the method of graft copolymerization to polypropylene staple fibers of acrylic acid and various bifunctional comonomers (divinylbenzene – DVB, ethyleneglycoldimethacrylate – EGDM, methylene-bis-acrylamide – MBAA). Sorption properties of the fibers towards cations of heavy and non-ferrous metals (Cо2+, Ni2+, Zn2+, Cd2+, Cu2+ и Pb2+) were studied on the model solutions in the dynamic regime. The dynamic activity of the crosslinked sorbents towards Cu2+ and Pb2+ ions is higher compared to fibrous analogues FIBAN Х-1, FIBAN Х-2, FIBAN К-6М, FIBAN К-5, VION КN-1. The best sorbent for lead ions between the crosslinked fibers is the fiber with EGDM. The fiber with MBAA has a higher affinity towards the cations of Ni2+, Zn2+, Cd2+ and Cа2+, which increases with the increasing of the degree of crosslinking by MBAA. Studying the fibers by the methods of Fourier-transform IR-spectroscopy, scanning electron microscopy, analyzing of the chemical oxygen demand in water extracts and determination of the equivalent moisture capacity coefficient coefficient demonstrated that the crosslinking by MBAA provides a stable structure of the sorbent. The high stability of the crosslinked structure combined with the high ion exchange capacity near 7 mEq/g and dynamic activity towards the cations of Pb2+, Zn2+, Cd2+ и Cа2+ makes the fibrous carboxyl sorbent with MBAA safe and perspective for drinking water purification.
About the Authors
L. M. Pryhazhayeva
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Pryhazhayeva Lidziya М. – Researcher
13, Surganov Str., 220072, Minsk
G. V. Medyak
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Medyak Galina V. – Ph. D. (Chemistгy), Leading Researcher
13, Surganov Str., 220072, Minsk
A. A. Shunkevich
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Shunkevich Aleksandr А. – Ph. D. (Chemistгy), Leading Researcher
13, Surganov Str., 220072, Minsk
A. P. Polikaгpov
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Polikaгpov Aleksaпdг Р. – Ph. D. (Chemistry), Head
of the Laboratory
13, Surganov Str., 220072, Minsk
V. A. Ogorodnikov
Belarusian of University of Food and Сhеmiсal
Technologies
Belarus
Belarus
Ogorodnikov Valery А. – Associate Professor of the
departmeпt
3, Shmidt Ave., 212027, Mogilev
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